While there are many examples of incidents that make theneed for more work around the human aspects of security apparent, theliterature makes it obvious that usable security can mean many dierentthings and usable security is a complex matter. This paper reports on astructured literature review that analyzed what the research communityconsiders to be included in the term "usable security". Publications fromthe past ve years were analyzed and dierent perceptions of usablesecurity were gathered. The result is a listing of the dierent aspectsthat are discussed under the term "usable security" and can be used as areference for future research of practitioners who are developing securityfunctions with usability in mind.